Palladium catalysed addition–substitution reaction of pronucleophiles with allenylstannanes and prop-2-ynylstannanes

Abstract
The palladium catalysed reactions of pronucleophiles 1 with allenylstannanes 2 or prop-2-ynylstannanes 3 give the corresponding addition–substitution products 4 in reasonable to high yields; this double alkylation reaction most probably proceeds through an allylstannane intermediate.